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    <title>Document</title>
    <script>
        var iNum = 10;
        var fNum = 10.1;
        var sName = "itcast";
        var bIsTrue = true;
        var unData;
        var nullData = null;
        var oPenson = {
            name:"itcast",
            age : 12
        }
        alert(typeof(oPenson))
        console.log(oPenson.name)
        console.log(oPenson.age)
    </script>

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